Applies to:

Connect the system to AC power. If the system is disconnected from AC power and unused for 14 days or more, the system enters a protection mode to preserve battery power. This is typically the case with brand new systems just being removed from the box. It is then necessary to connect the unit to AC power to reactivate the system

The battery may not be sufficiently charged. The battery must have some charge in order for it to power up the system